What are the cheapest airlines to fly from Region of Ontario to London Heathrow Airport one-way?

£237 is the cheapest one-way deal found within the past few days, from TAP AIR PORTUGAL. You may also be able to find cheap deals on WestJet and Icelandair, with prices starting from £262 and £283, respectively.

What are the most popular routes from Region of Ontario to London Heathrow Airport?

When deciding which route to take from Region of Ontario to London Heathrow Airport consider Toronto Pearson Intl - London Heathrow, Montreal Pierre Elliott Trudeau Intl - London Heathrow or Toronto Island - London Heathrow as they are the most popular.

What are the cheapest flights from Region of Ontario to London Heathrow Airport?

Looking for the cheapest flight from Region of Ontario to London Heathrow Airport? While on average our users pay £922, our data indicates the cheapest price to be £260. The most popular route (Toronto Pearson Intl - London Heathrow), is priced around £350.

What are the most reliable airlines from Region of Ontario to London Heathrow Airport?

No one likes to see their flight delayed. When booking a flight from Region of Ontario to London Heathrow Airport consider choosing Ethiopian Air (92%), Egyptair (86%) or Singapore Airlines (84%) as they are the most reliable in getting you off to your destination on time.

What are the most popular airlines that fly from Region of Ontario to London Heathrow Airport?

American Airlines, Air Canada and Air France are the most popular airlines when flying from Region of Ontario to London Heathrow Airport.

How far in advance should I book a flight from Region of Ontario to London Heathrow Airport?

To save up to 19% on this flight, we recommend booking at least 50 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from Region of Ontario to London Heathrow Airport from £463 1-2 weeks out and tickets from £604 for flights departing within the next 72 hours.

What is the cheapest month to fly from Region of Ontario to London Heathrow Airport?

February can be a great time to fly to London Heathrow Airport from Region of Ontario with a flight ticket averaging about £463. Cheapflights users have found deals in the month of February for as cheap as £285. The most expensive prices can be found in the month of December.

Can I find deals for flights from Ontario to Heathrow that include hotel bookings?

Yes. In addition to deals on Ontario to Heathrow flights, Cheapflights offers holiday packages that include both flights and hotel.

How can I find direct flights from Ontario to Heathrow?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Heathrow.

Can I find deals for business class flights from Ontario to Heathrow?

Yes. Cheapflights offers flight deals from Ontario to Heathrow by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

£198+ Flights from Ontario to London Heathrow Airport

Cheap flight deals from Ontario to Heathrow

Round-trip from	£364
One-way from	£198
Popular in	December
Cheapest in	February
Average price	£417
Good round-trip deal	£420 or less
Good one-way deal	£269 or less

Air Canada
9/6-23/6
1 total stop
20h 05m total
Ontario to London

Search Deals

8/8
1 total stop
15h 15m total
Ontario to London

Search Deals

Highest demand for flights based on searches. 2% potential increase in price (£9 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease (£10 potential savings vs. average return price).

Search Deals

Average for round-trip flights in May 2025

Search Deals

Price to beat on a round-trip flight from Ontario to London Heathrow.

Search Deals

Price to beat on a one-way flight from Ontario to London Heathrow.

Search Deals

Find flight deals from Ontario to Heathrow

Cheapest flights from Ontario to Heathrow
Explore the most affordable flight options available from Ontario to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 8 Mai 2025.

Mo 9/618:20YYZ - LHR

Nonstop7h 15mAir Canada

Mo 23/606:00LHR - YYZ

1 stop12h 50mAir Canada

Deal found 7/5£364

Do 22/523:00YYZ - LHR

1 stop16h 20mIcelandair

Fr 30/521:25LHR - YYZ

1 stop26h 45mIcelandair

Deal found 7/5£365

Fr 8/823:10YYZ - LHR

1 stop15h 15mMultiple Airlines

Sa 16/820:10LHR - YYZ

1 stop19h 00mMultiple Airlines

Deal found 5/5£374

Mo 27/1023:40YYZ - LHR

1 stop13h 50mTAP AIR PORTUGAL

Mo 3/1118:30LHR - YYZ

1 stop25h 15mTAP AIR PORTUGAL

Deal found 6/5£380

Di 10/608:50YTZ - LHR

2 stops16h 40mAir Canada

Di 17/606:00LHR - YTZ

2 stops15h 50mAir Canada

Deal found 7/5£388

Fr 6/622:25YUL - LHR

Nonstop6h 35mAir Canada

So 15/609:30LHR - YUL

Nonstop7h 10mAir Canada

Deal found 6/5£395

Do 13/1122:40YYZ - LHR

Nonstop7h 00mDelta

So 16/1108:40LHR - YYZ

1 stop12h 00mDelta

Deal found 7/5£401

Mi 4/618:20YYZ - LHR

Nonstop7h 15mLufthansa

Di 10/608:30LHR - YYZ

Nonstop7h 50mLufthansa

Deal found 6/5£406

Mi 4/622:25YUL - LHR

Nonstop6h 35mLufthansa

Sa 28/609:30LHR - YUL

Nonstop7h 10mLufthansa

Deal found 7/5£409

Mo 25/822:45YUL - LHR

1 stop15h 05mTAP AIR PORTUGAL

Di 9/919:50LHR - YUL

1 stop29h 55mTAP AIR PORTUGAL

Deal found 7/5£409

Mo 26/522:25YUL - LHR

Nonstop6h 35mMultiple Airlines

Mi 18/620:05LHR - YUL

2 stops21h 05mMultiple Airlines

Deal found 6/5£422

Di 13/520:15YYZ - LHR

1 stop30h 40mSWISS

So 18/506:00LHR - YYZ

1 stop15h 25mSWISS

Deal found 6/5£434

Best flights from Ontario to Heathrow
Discover carefully curated flight deals from Ontario to Heathrow that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 8 Mai 2025.

Mo 9/618:20YYZ - LHR

Nonstop7h 15mAir Canada

Mo 23/606:00LHR - YYZ

1 stop12h 50mAir Canada

Deal found 7/5£364

Do 22/523:00YYZ - LHR

1 stop16h 20mIcelandair

Fr 30/521:25LHR - YYZ

1 stop26h 45mIcelandair

Deal found 7/5£365

Fr 8/823:10YYZ - LHR

1 stop15h 15mMultiple Airlines

Sa 16/820:10LHR - YYZ

1 stop19h 00mMultiple Airlines

Deal found 5/5£374

Mo 27/1023:40YYZ - LHR

1 stop13h 50mTAP AIR PORTUGAL

Mo 3/1118:30LHR - YYZ

1 stop25h 15mTAP AIR PORTUGAL

Deal found 6/5£380

Mi 4/618:20YYZ - LHR

Nonstop7h 15mLufthansa

Di 10/608:30LHR - YYZ

Nonstop7h 50mLufthansa

Deal found 6/5£406

Mi 15/1022:30YYZ - LHR

Nonstop7h 10mVirgin Atlantic

Mi 22/1006:30LHR - YYZ

1 stop12h 00mVirgin Atlantic

Deal found 6/5£428

Di 20/520:15YYZ - LHR

1 stop15h 10mSWISS

Do 5/617:10LHR - YYZ

1 stop24h 40mSWISS

Deal found 7/5£434

So 18/518:15YYZ - LHR

1 stop10h 35mDelta

So 1/606:30LHR - YYZ

1 stop18h 25mDelta

Deal found 7/5£436

Do 22/515:00YYZ - LHR

1 stop10h 45mUnited Airlines

Sa 31/508:00LHR - YYZ

2 stops16h 05mUnited Airlines

Deal found 6/5£445

Mi 21/517:25YYZ - LHR

1 stop12h 45mAer Lingus

Mo 23/608:50LHR - YYZ

1 stop11h 50mAer Lingus

Deal found 6/5£448

Di 20/520:15YYZ - LHR

2 stops20h 25mAustrian Airlines

Di 10/606:00LHR - YYZ

2 stops18h 45mAustrian Airlines

Deal found 6/5£457

Mo 8/922:10YUL - LHR

Nonstop6h 40mFinnair

Mo 22/918:05LHR - YUL

Nonstop7h 10mFinnair

Deal found 6/5£460

Direct flights from Ontario to Heathrow
Explore direct flight options from Ontario to Heathrow based on user searches, and compare prices and availability for your desired travel dates. Data last updated 8 Mai 2025.

Di 3/618:20YYZ - LHR

Nonstop7h 15mAir Canada

Fr 13/616:00LHR - YYZ

Nonstop7h 50mAir Canada

Deal found 6/5£388

Fr 6/622:25YUL - LHR

Nonstop6h 35mAir Canada

So 15/609:30LHR - YUL

Nonstop7h 10mAir Canada

Deal found 6/5£395

Sa 27/922:30YYZ - LHR

Nonstop7h 10mVirgin Atlantic

Do 30/1014:00LHR - YYZ

Nonstop7h 55mVirgin Atlantic

Deal found 7/5£403

Mi 4/618:20YYZ - LHR

Nonstop7h 15mLufthansa

Di 10/608:30LHR - YYZ

Nonstop7h 50mLufthansa

Deal found 6/5£406

Mi 4/622:25YUL - LHR

Nonstop6h 35mLufthansa

Sa 28/609:30LHR - YUL

Nonstop7h 10mLufthansa

Deal found 7/5£409

Fr 26/922:30YYZ - LHR

Nonstop7h 10mDelta

So 5/1017:50LHR - YYZ

Nonstop7h 50mDelta

Deal found 7/5£420

Mi 4/622:25YUL - LHR

Nonstop6h 35mMultiple Airlines

Mo 30/609:30LHR - YUL

Nonstop7h 10mMultiple Airlines

Deal found 6/5£423

Mi 8/1022:00YYZ - LHR

Nonstop7h 15mBritish Airways

Mo 13/1013:20LHR - YYZ

Nonstop7h 40mBritish Airways

Deal found 6/5£439

Mi 1/1022:10YUL - LHR

Nonstop6h 40mBritish Airways

So 12/1018:05LHR - YUL

Nonstop7h 10mBritish Airways

Deal found 6/5£447

Do 18/922:05YUL - LHR

Nonstop6h 40mFinnair

Do 9/1018:05LHR - YUL

Nonstop7h 10mFinnair

Deal found 6/5£453

Mo 27/1023:05YYZ - LHR

Nonstop7h 10mAmerican Airlines

Mi 5/1111:45LHR - YYZ

Nonstop8h 10mAmerican Airlines

Deal found 6/5£455

Mo 22/918:05YYZ - LHR

Nonstop7h 10mFinnair

Mi 8/1013:20LHR - YYZ

Nonstop7h 40mFinnair

Deal found 7/5£457

Last-minute flights from Ontario to Heathrow
Discover last-minute flight deals from Ontario to Heathrow. Data last updated 8 Mai 2025 and is based on user searches.

Mo 12/517:25YYZ - LHR

1 stop11h 55mAer Lingus

So 15/608:50LHR - YYZ

1 stop11h 50mAer Lingus

Deal found 6/5£451

Di 13/518:20YYZ - LHR

Nonstop7h 15mMultiple Airlines

Di 20/508:30LHR - YYZ

Nonstop7h 50mMultiple Airlines

Deal found 6/5£397

Di 13/523:15YYZ - LHR

1 stop28h 20mLufthansa

So 18/508:30LHR - YYZ

Nonstop7h 50mLufthansa

Deal found 6/5£406

Di 13/522:25YUL - LHR

Nonstop6h 35mLufthansa

Di 27/509:30LHR - YUL

Nonstop7h 10mLufthansa

Deal found 5/5£409

Di 13/510:20YTZ - LHR

2 stops15h 10mAir Canada

Di 20/506:00LHR - YTZ

2 stops15h 50mAir Canada

Deal found 6/5£417

Di 13/519:10YUL - LHR

1 stop10h 30mAir Canada

Di 27/509:30LHR - YUL

Nonstop7h 10mAir Canada

Deal found 6/5£430

Di 13/520:15YYZ - LHR

1 stop30h 40mSWISS

Sa 17/508:45LHR - YYZ

1 stop12h 40mSWISS

Deal found 6/5£434

Di 13/513:55YYZ - LHR

1 stop12h 20mUnited Airlines

Fr 30/508:30LHR - YYZ

1 stop12h 16mUnited Airlines

Deal found 6/5£445

Di 13/520:15YYZ - LHR

1 stop30h 40mSWISS

So 18/506:00LHR - YYZ

1 stop15h 25mSWISS

Deal found 6/5£434

Mi 14/516:00YYZ - LHR

1 stop9h 30mAir Canada

Do 12/606:00LHR - YYZ

1 stop11h 50mAir Canada

Deal found 7/5£369

Do 15/522:30YYZ - LHR

Nonstop7h 10mKLM

So 18/508:40LHR - YYZ

1 stop16h 15mKLM

Deal found 7/5£436

Do 15/522:30YYZ - LHR

Nonstop7h 10mDelta

So 25/520:10LHR - YYZ

1 stop18h 20mDelta

Deal found 7/5£441

One-way flights from Ontario to Heathrow
Search for one-way flight options from Ontario to Heathrow. Find affordable one-way fares based on user searches. Data last updated 8 Mai 2025.

Fr 8/823:10YYZ - LHR

1 stop15h 15mMultiple Airlines

Deal found 5/5£198

Do 23/1023:50YYZ - LHR

1 stop14h 00mTAP AIR PORTUGAL

Deal found 7/5£237

Mi 24/922:45YUL - LHR

1 stop18h 15mTAP AIR PORTUGAL

Deal found 6/5£245

Di 8/705:55YOW - LHR

2 stops34h 45mMultiple Airlines

Deal found 6/5£249

Do 17/718:35YUL - LHR

2 stops18h 10mMultiple Airlines

Deal found 6/5£257

Mi 15/1015:45YOW - LHR

1 stop15h 20mWestJet

Deal found 7/5£262

Sa 14/618:55YTZ - LHR

3 stops46h 20mMultiple Airlines

Deal found 7/5£263

Mi 24/920:50YYZ - LHR

1 stop10h 05mIcelandair

Deal found 7/5£283

Fr 31/1016:45YUL - LHR

1 stop16h 05mWestJet

Deal found 6/5£295

Do 23/1006:00YHM - LHR

1 stop25h 05mWestJet

Deal found 7/5£304

Di 15/717:25YTZ - LHR

1 stop11h 35mAir Canada

Deal found 5/5£305

Mo 12/517:25YYZ - LHR

1 stop11h 55mAer Lingus

Deal found 6/5£305

Cheapflights Fare Finder

Use the filters below to find and compare flights from Ontario to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Mo 9/6

18:20-06:35

Nonstop7h 15m

London Heathrow

Mo 23/6

06:00-13:50

1 stop12h 50m

£364

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Do 22/5

23:00-20:20

1 stop16h 20m

London Heathrow

Fr 30/5

21:25-19:10

1 stop26h 45m

£365

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Fr 8/8

23:10-19:25

1 stop15h 15m

London Heathrow

Sa 16/8

20:10-10:10

1 stop19h 00m

£374

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Mo 27/10

23:40-17:30

1 stop13h 50m

London Heathrow

Mo 3/11

18:30-14:45

1 stop25h 15m

£380

TorontoLondon

YTZ - LHR

YTZLHR

Toronto Island

Sa 7/6

19:20-08:35

1 stop8h 15m

London Heathrow

Sa 14/6

06:50-14:50

2 stops13h 00m

£388

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Fr 6/6

22:25-10:00

Nonstop6h 35m

London Heathrow

So 15/6

09:30-11:40

Nonstop7h 10m

£395

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Mi 4/6

18:20-06:35

Nonstop7h 15m

London Heathrow

Di 10/6

08:30-11:20

Nonstop7h 50m

£406

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Mi 4/6

22:25-10:00

Nonstop6h 35m

London Heathrow

Sa 28/6

09:30-11:40

Nonstop7h 10m

£409

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Mo 25/8

22:45-18:50

1 stop15h 05m

London Heathrow

Di 9/9

19:50-20:45

1 stop29h 55m

£409

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Mo 26/5

22:25-10:00

Nonstop6h 35m

London Heathrow

Mi 18/6

20:05-12:10

2 stops21h 05m

£422

Flights are sorted by cheapest return flights first.

Deals found on 5/5

Showing 1-10 of 60 results

...

Best time to book a flight from Ontario to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from Ontario with our price prediction graph.

Estimated return price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Ontario to London Heathrow Airport

What is the cheapest month to book a flight from Region of Ontario to London Heathrow Airport?

Currently, January is the cheapest month in which you can book a flight from Region of Ontario to London Heathrow Airport (average of £112). Flying from Region of Ontario to London Heathrow Airport in August is currently the most expensive (average of £164). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ON to LHR?

When flying from Region of Ontario to London Heathrow Airport, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from Region of Ontario to London Heathrow Airport

The most flights from CAON to LHR are scheduled on a Tuesday (40 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (29 on average).

Rainfall in Heathrow by month

In terms of precipitation, rainfall in London Heathrow Airport ranges from 40.0 - 70.0 inches per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London Heathrow Airport when rainfall is around 40.0 mm.

Temperature in Heathrow by month

If weather is an important factor for your trip to London Heathrow Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C).

Reviews of airlines servicing Heathrow

Read through reviews of airlines operating flights from Ontario to London, such as Delta, Azores Airlines and Austrian Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very Good

7,946 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Delta

8.0

Very Good

7,946 reviews

Delta

8.0

Very Good

7,946 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Azores Airlines

7.6

Good

66 reviews

Delta

8.0

Very Good

7,946 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Austrian Airlines

7.6

Good

782 reviews

Delta

8.0

Very Good

7,946 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Finnair

7.6

Good

1,276 reviews

Delta

8.0

Very Good

7,946 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Air France

7.5

Good

1,449 reviews

Delta

8.0

Very Good

7,946 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

What are the cheapest airlines to fly from Region of Ontario to London Heathrow Airport one-way?
£237 is the cheapest one-way deal found within the past few days, from TAP AIR PORTUGAL. You may also be able to find cheap deals on WestJet and Icelandair, with prices starting from £262 and £283, respectively.
What are the most popular routes from Region of Ontario to London Heathrow Airport?
When deciding which route to take from Region of Ontario to London Heathrow Airport consider Toronto Pearson Intl - London Heathrow, Montreal Pierre Elliott Trudeau Intl - London Heathrow or Toronto Island - London Heathrow as they are the most popular.
What are the most reliable airlines from Region of Ontario to London Heathrow Airport?
No one likes to see their flight delayed. When booking a flight from Region of Ontario to London Heathrow Airport consider choosing Ethiopian Air (92%), Egyptair (86%) or Singapore Airlines (84%) as they are the most reliable in getting you off to your destination on time.
What are the cheapest flights from Region of Ontario to London Heathrow Airport?
Looking for the cheapest flight from Region of Ontario to London Heathrow Airport? While on average our users pay £922, our data indicates the cheapest price to be £260. The most popular route (Toronto Pearson Intl - London Heathrow), is priced around £350.
Can I find deals for flights from Ontario to Heathrow that include hotel bookings?
Yes. In addition to deals on Ontario to Heathrow flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Ontario to Heathrow?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Heathrow.
Can I find deals for business class flights from Ontario to Heathrow?
Yes. Cheapflights offers flight deals from Ontario to Heathrow by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from Region of Ontario to London Heathrow Airport?
Currently, January is the cheapest month in which you can book a flight from Region of Ontario to London Heathrow Airport (average of £112). Flying from Region of Ontario to London Heathrow Airport in August is currently the most expensive (average of £164). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Deal

Hounslow

Milton Keynes

Luton

Gatwick

Slough

Croydon

Eastbourne

Wembley

Northampton

Crawley

Hayes

Southend-on-Sea

Ipswich

Watford

Ilford

Swindon

Folkestone

Maidstone

Winchester

Browse thousands of different options on Cheapflights for your next trip

Top 10 airlines flying from Ontario to Heathrow

Airline	Cheapest	Average	Flexibility	On-time
TAP AIR PORTUGAL	Cheapest£247	Average£362	FlexibilityNo cancel fee	On-timeN/A	Search TAP AIR PORTUGAL flights
Air Transat	Cheapest£344	Average£502	FlexibilityNo cancel fee	On-time50%	Search Air Transat flights
Aer Lingus	Cheapest£363	Average£467	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights
Icelandair	Cheapest£368	Average£499	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
Air Canada	Cheapest£376	Average£764	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
Virgin Atlantic	Cheapest£398	Average£460	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
Lufthansa	Cheapest£403	Average£588	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
British Airways	Cheapest£406	Average£527	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
KLM	Cheapest£407	Average£520	FlexibilityNo cancel fee	On-time75%	Search KLM flights
American Airlines	Cheapest£419	Average£419	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights

Fly with Cheapflights

How does Cheapflights help users find flights from Ontario to Heathrow?

Cheapflights makes it easy to find Ontario to Heathrow flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from Ontario to Heathrow?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Ontario to Heathrow for you. Better yet — we are completely free to use.

Can Cheapflights find flights from Ontario to Heathrow with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Ontario to Heathrow flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from Ontario to Heathrow become cheaper?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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Cheap flights from Ontario to London Heathrow Airport from £198

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/8. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Ontario to Heathrow

Keep the following information in mind while searching for Ontario to Heathrow flight deals. Data was last updated 8 Mai 2025.

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Find flight deals from Ontario to Heathrow

Cheapest flights from Ontario to HeathrowExplore the most affordable flight options available from Ontario to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 8 Mai 2025.

Explore the most affordable flight options available from Ontario to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 8 Mai 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Ontario to London Heathrow Airport that are best for you.

Best time to book a flight from Ontario to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from Ontario with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Ontario to London Heathrow Airport

What is the cheapest month to book a flight from Region of Ontario to London Heathrow Airport?

What is the cheapest time of day to fly from ON to LHR?

Find hourly flight availability from Ontario to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 8 Mai 2025.

Weekly flight availability from Region of Ontario to London Heathrow Airport

Explore weekly flight availability from Ontario to Heathrow. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 8 Mai 2025.

Rainfall in Heathrow by month

Plan your trip to Heathrow by taking into account the average rainfall totals by month.

Temperature in Heathrow by month

Plan your trip to Heathrow by taking into account the average temperature totals by month.

Reviews of airlines servicing Heathrow

Read through reviews of airlines operating flights from Ontario to London, such as Delta, Azores Airlines and Austrian Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Heathrow. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What are the cheapest airlines to fly from Region of Ontario to London Heathrow Airport one-way?

What are the most popular routes from Region of Ontario to London Heathrow Airport?

What are the most reliable airlines from Region of Ontario to London Heathrow Airport?

What are the cheapest flights from Region of Ontario to London Heathrow Airport?

Can I find deals for flights from Ontario to Heathrow that include hotel bookings?

How can I find direct flights from Ontario to Heathrow?

Can I find deals for business class flights from Ontario to Heathrow?

What is the cheapest month to book a flight from Region of Ontario to London Heathrow Airport?

Travelling to a place near Ontario?

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Alternative routes for Ontario to Heathrow

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Top 10 airlines flying from Ontario to Heathrow

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Cheapest flights from Ontario to Heathrow
Explore the most affordable flight options available from Ontario to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 8 Mai 2025.